Answer
$$13.5747 + 24.4894i$$
Work Step by Step
$$\eqalign{
& \left( {4\operatorname{cis} 19.25^\circ } \right)\left( {7\operatorname{cis} 41.75^\circ } \right) \cr
& {\text{Multiply use the product theorem}} \cr
& = 4 \times 7\operatorname{cis} \left( {19.25^\circ + 41.75^\circ } \right) \cr
& = 28\operatorname{cis} \left( {61^\circ } \right) \cr
& {\text{Write in trigonometric form}} \cr
& = 28\left[ {\cos 61^\circ + i\sin 61^\circ } \right] \cr
& {\text{Use a calculator}} \cr
& \approx 13.5747 + 24.4894i \cr} $$
